/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.fs.dummy;

import org.apache.flink.core.fs.FileSystem;
import org.apache.flink.core.fs.FileSystemFactory;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;

/** Factory of dummy FileSystem. See documentation of {@link DummyFSFileSystem}. */
public class DummyFSFactory implements FileSystemFactory {

    private final FileSystem fileSystem = new DummyFSFileSystem(getData());

    @Override
    public String getScheme() {
        return DummyFSFileSystem.FS_URI.getScheme();
    }

    @Override
    public FileSystem create(URI fsUri) {
        String anotherFileSystemClassName =
                "org.apache.flink.fs.anotherdummy.AnotherDummyFSFileSystem";
        try {
            this.getClassLoader().loadClass(anotherFileSystemClassName);
            throw new RuntimeException(
                    String.format(
                            "Class %s should not be visible for classloader of %s",
                            anotherFileSystemClassName, this.getClass().getCanonicalName()));
        } catch (ClassNotFoundException e) {
            // Expected exception.
        }
        return fileSystem;
    }

    private static Map<String, String> getData() {
        Map<String, String> data = new HashMap<>();
        data.put("/words", "Hello World how are you, my dear dear world\n");
        return data;
    }
}
